Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1581143 | Materials Science and Engineering: A | 2009 | 9 Pages |
Abstract
This work is concerned with an analysis of fatigue damage accumulation and failure of open cell metal foams. For an efficient numerical analysis, a failure event based simulation procedure is proposed, which considers the failure of individual struts as particular discrete failure events governing the degradation of the foam microstructure during cyclic loading. In a simplifying approach the cyclic stress-strain-response between the discrete failure events is assumed to be independent of time. In conjunction with Miner's rule for the description of the fatigue damage accumulation within the individual struts a numerically efficient computational scheme is obtained, requiring the simulation of only a limited number of cycles. The microscopic results are transferred to the macroscopic level by means of a strain energy based homogenization procedure. In a number of parametric studies on the fatigue behavior of Kelvin foams and a comparison with experimental data, the proposed computational scheme proves to be both accurate and numerically efficient.
Related Topics
Physical Sciences and Engineering
Materials Science
Materials Science (General)
Authors
Serkan Demiray, Wilfried Becker, Jörg Hohe,